TY - JOUR
T1 - Mode i stress intensity factor of center-cracked tensile steel plates with CFRP reinforcement
AU - Wu, Chao
AU - Zhao, Xiao Ling
AU - Al-Mahaidi, Riadh
AU - Duan, Wen Hui
N1 - Funding Information:
The authors gratefully acknowledge the ¯nancial support provided by the Australian Research Council through an ARC Discovery Grant. Data on fatigue testing of CCT steel plates with CFRP sheeting systems were kindly provided by Dr. Liu Hongbo. The authors also wish to thank the CSI lab at Swinburne University of Technology for providing their facilities and gratefully acknowledge Mr. Mohammad R. Emdad's assistance in carrying out the experimental testing.
PY - 2013/2
Y1 - 2013/2
N2 - Advanced carbon fiber reinforced polymer (CFRP) demonstrates promise for the fatigue strengthening of steel structures. By decreasing the stress field at the crack tip, the stress intensity factors (SIFs) can be effectively reduced by CFRP reinforcement. In this paper, the mode I SIF of CFRP-reinforced center-cracked tensile (CCT) steel plate is proposed based on a series of fatigue tests. The selected fatigue tests include experiments conducted by the authors as well as fatigue tests reported in the literature, covering different CFRP systems (low/high modulus, CFRP sheeting/plate) with various CFRP strengthening dimensions. The classical mode I SIF of CCT steel plate without CFRP strengthening is selected as the basis of the proposed solution. Then two reduction factors, similar to the correction factors given in the Japanese Society of Steel Construction (JSSC) standard, are introduced to study the effects of the mechanical properties of CFRP composites and the geometries of the CFRP reinforcement, respectively. Modified SIFs for both single-side CFRP-reinforced and double-side CFRP-reinforced CCT steel plates are proposed. It is found that the experimental SIFs of CFRP-reinforced CCT steel plates can be reasonably captured by the proposed mode I SIF formula. Finally, parametric studies for investigating the sensitivity of SIF to various mechanical and geometric factors are presented.
AB - Advanced carbon fiber reinforced polymer (CFRP) demonstrates promise for the fatigue strengthening of steel structures. By decreasing the stress field at the crack tip, the stress intensity factors (SIFs) can be effectively reduced by CFRP reinforcement. In this paper, the mode I SIF of CFRP-reinforced center-cracked tensile (CCT) steel plate is proposed based on a series of fatigue tests. The selected fatigue tests include experiments conducted by the authors as well as fatigue tests reported in the literature, covering different CFRP systems (low/high modulus, CFRP sheeting/plate) with various CFRP strengthening dimensions. The classical mode I SIF of CCT steel plate without CFRP strengthening is selected as the basis of the proposed solution. Then two reduction factors, similar to the correction factors given in the Japanese Society of Steel Construction (JSSC) standard, are introduced to study the effects of the mechanical properties of CFRP composites and the geometries of the CFRP reinforcement, respectively. Modified SIFs for both single-side CFRP-reinforced and double-side CFRP-reinforced CCT steel plates are proposed. It is found that the experimental SIFs of CFRP-reinforced CCT steel plates can be reasonably captured by the proposed mode I SIF formula. Finally, parametric studies for investigating the sensitivity of SIF to various mechanical and geometric factors are presented.
KW - CFRP (carbon fiber reinforced polymer)
KW - fatigue
KW - SIF (stress intensity factor)
KW - strengthening
UR - http://www.scopus.com/inward/record.url?scp=84874816069&partnerID=8YFLogxK
U2 - 10.1142/S0219455413500053
DO - 10.1142/S0219455413500053
M3 - Journal article
AN - SCOPUS:84874816069
SN - 0219-4554
VL - 13
JO - International Journal of Structural Stability and Dynamics
JF - International Journal of Structural Stability and Dynamics
IS - 1
M1 - 1350005
ER -